| 其他書名 | Forum Proceedings, February 3-5, 1989, Washington, DC. |
| 出版 | Department of Health and Human Services, Office of Human Development Services, President's Committee on Mental Retardation, 1989 |
| URL | http://books.google.com.hk/books?id=xFFEAAAAYAAJ&hl=&source=gbs_api |
| EBook | FULL_PUBLIC_DOMAIN |